Harsh, too, on Roberto Di Matteo when the evening provided more evidence that Chelsea’s young manager has a knack for making the right call on these big European occasions. In selecting Oscar ahead of Juan Mata for the 21-year-old Brazilian’s home debut, he had produced another tactical masterstroke.

Oscar succeeded in two roles — supporting the midfield by marshalling Andrea Pirlo and also in leading from the front.

Two goals in as many first-half minutes were a fine introduction to a Stamford Bridge crowd that rose to its feet after his second strike, a stunning right-foot shot on the turn that curled beyond the reach of the diving Gianluigi Buffon.

Oscar described himself as ‘an elegant ball player’ when he arrived at Chelsea and that was certainly true of the finish he produced in the 33rd minute.

The discipline Oscar displayed in tracking Pirlo, however, was not matched by his defensive colleagues. A moment’s lapse in concentration enabled Arturo Vidal to reduce the deficit within five minutes, before Quagliarella stepped off the bench to seize on Mikel’s mistake.

Yet there remained plenty of positives. No team has successfully defended the European Cup in the Champions League era and the road to Wembley looks perilous given the quality of Chelsea’s group. But Di Matteo has to be happy with the way his side is evolving.

Oh no: Roberto Di Matteo was disappointed with drawing from 2-0 up

Roar: The champions celebrate taking the leadThere was an almost biblical theme to Chelsea’s spending during the summer when Victor Moses followed Eden Hazard but the latter, like Oscar, offers a new dimension to the current kings of Europe.

Having paraded their trophy before kick-off, Chelsea started much as they concluded the last campaign on the Continent. They were confident and composed, with David Luiz the first to threaten when he met a Frank Lampard corner with an effort that bounced into the arms of Buffon.

Pirlo has not been his peerless self since the summer and with Oscar snapping at his heels, some of his early passes were not as precise as an English side might expect.

But the best of the early chances did fall to Juventus, the excellent Claudio Marchisio escaping the attention of the Chelsea back four in pursuit of a Vidal ball that called on Petr Cech to react fast and make a courageous block.

Back in it: Arturo Vidal celebrates his goal

Hey ref! Eden Hazard wanted a penalty after being shoved by Stephan LichtsteinerJuve were a threat on the counter-attack. Mirko Vucinic was sent clear by Vidal, only to send his shot into the side- netting when he should have tested Cech. But Chelsea remained the more positive of the two teams and their reward  came with the two goals from Oscar. The first was a simple move. A throw-in from Ashley Cole and a ball across the face of the Juve penalty area from Hazard saw Oscar unleash a shot that took a significant deflection off Giorgio Chiellini to fly over Buffon.

If that was a little fortunate, there was nothing remotely lucky about the goal that followed. It was a beauty. After collecting another pass from Cole with his back to goal, the £25million summer signing turned to beat Buffon again from more than 20 yards.

That Juventus responded as quickly as they did disappointed Di Matteo. Only a five minutes had passed when the excellent Vidal guided a left-foot shot through a crowded penalty area and beyond Cech.

Spirit: Fernando Torres bounced back and had a good match

Back to square one: Torres and Juan Mata kick off after Quagliarella’s goalBut the advantage remained with Chelsea going into the second half and they  performed with a real sense of urgency to begin with. Branislav Ivanovic and Lampard both tested Buffon, before Hazard burst into the Juventus box with a run that almost  certainly should have earned him a penalty given the blatant shove in the back he received from Andrea Barzagli.

It made what followed all the more painful for Di Matteo, even if his frustration may have been directed more at Mikel. It was the Nigerian who failed to challenge Vidal when he scored his goal and Mikel whose loose pass was intercepted by the magnificent Marchisio.

In response came a rather superior pass that invited Quagliarella to run off the shoulder of John Terry and guide his shot through the legs of Cech.

No prizes there for anyone in blue.

Final say: Quagliarella had the last word

All for this: The trophy is paraded around Stamford Bridge

Didi do it? Yes, he certainly did

Oscar made his first start for Chelsea in the Champions League, in the No 11 shirt worn by the man who won the trophy with his last kick for the club. No pressure.

Oscar did not begin convincingly. He was off the tempo and passes didn’t find their targets, but this changed with two goals in three minutes. The touch to accept the pass ahead of his second was beautiful.  It helped him relax and suggested he can fill the shirt of Didier Drogba.

Desailly eyeing dug-out

Marcel Desailly was among a healthy scattering of Chelsea greats at Stamford Bridge on Wednesday night but is looking for a way out of his punditry duties and into the dug-out.

‘I’m doing my coaching badges and just finishing my Pro-Licence,’ he said. ‘I look forward to getting back into football with a coaching or management job. Slowly, slowly, I’m getting back to business.’

Young guns beware

Chelsea won this competition with know-how garnered from years of European campaigning. This is a younger, fresher squad and the Champions League will be a test for them. It will be new to Moses and Oscar.

Azpilicueta and Hazard have not been deep into the knock-out rounds. Manchester United hit trouble last year with a young squad and Roberto Di Matteo will be wary of the same trap.

Di Matteo hamstrung up front

There was no sign of Daniel Sturridge in the matchday 18, despite Roberto Di Matteo reporting a clean bill of health on the eve of the game. News of a hamstring injury trickled out; a reminder, if needed, of the scarcity of genuine central strikers in the Chelsea squad.

The Stamford Bridge manager’s options on the bench were Victor Moses, Juan Mata, three defenders and a defensive midfielder.